Trevor Seraphine homicide: brothers Curtis and Corey Murray wanted

Toronto police have issued warrants for two brothers wanted in connection with the killing of 17-year-old Trevor Seraphine.

Police described the brothers, Curtis and Corey Murray, as dangerous and warned they may attempt to flee the country.

"There are two very dangerous people that are out there," said Det. Tam Bui during a Monday afternoon news conference about the Seraphine case.

- Police release image of 2 suspects in Seraphine killing

​Bui said Curtis Murray, of Brampton, has a "long criminal record" that includes assault with a weapon, sexual assault and extortion.

His brother, Corey Murray, said Bui, is wanted for violating parole and on various warrants from Peel Regional Police, ​and has been on the run since March 2014.

"We have credible information that both brothers might be attempting to leave the country," Bui told reporters. "I am urging the community not to assist these two in fleeing prosecution."

Seraphine was found suffering from multiple gunshot wounds at an Etobicoke apartment complex early on March 21. He was later pronounced dead in hospital.

Investigators asked anyone with information about the Murray brothers' whereabouts to contact police immediately.

Trevor Seraphine was a shy boy, sister says

Xabie Seraphin, Trevor’s sister, spoke briefly at the emotional news conference.

"I just want to know why these guys killed my brother," she said, before breaking down into tears.

She described her brother as shy, but said he had lots of friends. He wanted to be an engineer. He also loved to rap.

As tears rolled down her cheeks, Seraphin said her brother "didn’t even get a chance to live,"

An online fundraiser, meanwhile, is attempting to raise enough money to bring Seraphin's parents, who live in St. Lucia, to Toronto for the burial.

Police encouraged the public to donate to help the family.

Block sale items

Police are also looking for items bought during a block sale at that same apartment building, 44 Willowridge Dr., one day prior to the shooting.

Bui said items at that sale are evidence in the case, and whoever has them is asked to take them to 23 Division.

"You are not in any trouble. You will not face any criminal charges," Bui said. "You will only be assisting Trevor's family."